Answer:
B. 15 percent
Step-by-step explanation:
we can explain the answer with an example:
1 dollar is convert into 1 euro
This euro is invested at 8% generating 1.08 Euros
Then as the dollar depreciate the exchange rate is: 1 euro = 1.07 dollars
thus 1.08 euro x 1.07 dollar per euro = 1.1556
The effective rate is 15,56%
from the proposed answer we pick 15% as is the closest.